Question

How many electrons would it take to equal the mass of a proton? Use two significant figures.

Answer 1

How many electrons would it take to equal the mass of a proton:
Here's one way of finding the value of it:
=> number of electrons is equivalent to 1 proton.
Let's have an example.
1.6726*10 -24g
_______________
     1 proton
______________
9.109*10- ^28g
_______________
1 electron

Based on the given example above, the electrons is 1 839 per 1 proton.
It's about 1800 electrons/proton.

Answer 2

Answer:

$10^{3}$

Explanation:

(i) The mass of an electron:

$9.11*10^{-31}kg$

(j) The mass of a proton:

$1.67*10^{-27} kg$

$9.11*10^{-31}kg * x = 1.67*10^{-27} kg$

$x = 0.18 * 10^{4}$, then $1.8*10^{3}$ or 1800

Here my answer is 10^3 because I expressed order of magnitude.

It's when we approximate to the nearest tenth power.